Expose ROCr build ID.

Adds HSA_AMD_SYSTEM_INFO_BUILD_VERSION=0x200 to hsa_system_info_t.
This returns a const char* pointing at the build string (git describe).

Change-Id: I73e6612482bf6ffc4037fd365808eb9211a650ad


[ROCm/ROCR-Runtime commit: cd8e5c1da8]

projects/rocr-runtime/runtime/hsa-runtime/core/runtime/runtime.cpp

@@ -585,6 +585,10 @@ hsa_status_t Runtime::GetSystemInfo(hsa_system_info_t attribute, void* value) {
 
       break;
     }
+    case HSA_AMD_SYSTEM_INFO_BUILD_VERSION: {
+      *(const char**)value = STRING(ROCR_BUILD_ID);
+      break;
+    }
     default:
       return HSA_STATUS_ERROR_INVALID_ARGUMENT;
   }

projects/rocr-runtime/runtime/hsa-runtime/inc/hsa.h

@@ -476,7 +476,11 @@ typedef enum {
    * implementation. An extension with an ID of @p i is supported if the bit at
    * position @p i is set. The type of this attribute is uint8_t[128].
    */
-  HSA_SYSTEM_INFO_EXTENSIONS = 7
+  HSA_SYSTEM_INFO_EXTENSIONS = 7,
+  /**
+  * String containing the ROCr build identifier.
+  */
+  HSA_AMD_SYSTEM_INFO_BUILD_VERSION = 0x200
 } hsa_system_info_t;
 
 /**